WE stay at Nirvana, I am very familiar with the it. I asked the manager for a tout while I was there in March, of all the units ( cottages/villas) I hadn't seen. I wanted to see in case someone just like you, asked this very question, as I am on a few Negril message boards.
Cottage #2 is on the road side of the "resort". It has 2 bathrooms, and is very spacious, with a large dining table. Good for more than 4 people. Tucked in the corner, its fairly private. All the cottages have screened in living areas, with lots of foliage, so its airy and feels like being outside.
Great staff, many have been there for 20 years, beautiful beach, double lot, security is wonderful, housekeeping daily, you cant go wrong.